Quickly see who you follow & who follows you while scrolling twitter. PFPs will be augmented with color coded borders.
Profile pictures (PFPs) are augmented with color coded borders across Twitter - using a simple color code which you will get accustomed to very quickly:
Green = You follow each other
Blue = Account which follows you (but you don't follow back)
Red = An account that you follow (but this account does not follow you)